Way Beyond Black Belt Sudoku(r) -- Frank Longo

<b>Go way beyond difficult, with the hardest, most brain-busting sudoku you've ever seen </b> <p/> Calling all sudoku-solving diehards: with every puzzle requiring upper-level strategies, this collection packs even more of a punch than our previous <i>Beyond Black Belt Sudoku</i>. Get ready, because you'll encounter common advanced techniques with curious-sounding names like XYZ-Wing, Finned X-Wing, Sashimi X-Wing, Swordfish, Jellyfish, Gordonian Rectangle, and Gordonian Polygon. And you might find some tricky new things here, too, from Grouped X-Cycle and Simple Grid Coloring to 3D Medusa and Bi-Value Universal Grave. The sudoku generally become increasingly difficult as the book goes along, from "pretty darn hard" to "excruciating." Are you up for the challenge?<br><br><b>Author:</b> Frank Longo<br><b>Publisher:</b> Puzzlewright<br><b>Published:</b> 10/01/2019<br><b>Pages:</b> 192<br><b>Binding Type:</b> Paperback<br><b>Weight:</b> 0.50lbs<br><b>Size:</b> 8.20h x 5.30w x 0.30d<br><b>ISBN:</b> 9781454933571<br><p><b>About the Author</b><br>Frank Longo is a freelance puzzle creator living in Hoboken, NJ. He has had over 2,000 puzzles published since 1993. Longo has written many books for Sterling, such as <i>Hip Pocket Sudoku</i>, <i>Master Ninja Sudoku</i>, <i>Sudoku to Exercise Your Mind</i>, and <i>Beyond Black Belt Sudoku</i>, as well as many crossword books. His books have combined sales of more than five million copies.</p>